[CUDA] Temporarily undefine __noinline__ when including bits/shared_ptr_base.h

This avoid CUDA compilation errors caused by CUDA headers defining __noinline__
and conflicting with __noinline__ use in libstdc++.

Differential Revision: https://reviews.llvm.org/D149364

diff --git a/clang/lib/Headers/CMakeLists.txt b/clang/lib/Headers/CMakeLists.txt
index 7c2f323..f8d6862 100644 (file)
--- a/clang/lib/Headers/CMakeLists.txt
+++ b/clang/lib/Headers/CMakeLists.txt
@@ -262,6 +262,7 @@ set(cuda_wrapper_files
   cuda_wrappers/cmath
   cuda_wrappers/complex
   cuda_wrappers/new
+  cuda_wrappers/bits/shared_ptr_base.h
 )
 
 set(ppc_wrapper_files

diff --git a/clang/lib/Headers/cuda_wrappers/bits/shared_ptr_base.h b/clang/lib/Headers/cuda_wrappers/bits/shared_ptr_base.h
new file mode 100644 (file)
index 0000000..10028dd
--- /dev/null
+++ b/clang/lib/Headers/cuda_wrappers/bits/shared_ptr_base.h
@@ -0,0 +1,9 @@
+// CUDA headers define __noinline__ which interferes with libstdc++'s use of
+// `__attribute((__noinline__))`. In order to avoid compilation error,
+// temporarily unset __noinline__ when we include affected libstdc++ header.
+
+#pragma push_macro("__noinline__")
+#undef __noinline__
+#include_next "bits/shared_ptr_base.h"
+
+#pragma pop_macro("__noinline__")